The premier resource for Terrafirma products and product information on the Internet. Terrafirma offers the largest range of Land Rover upgrades and accessories under a single-brand anywhere in the world. The award-winning Terrafirma brand is now one of the most significant and dynamic brands of product in the market with products to suit all levels and budgets. We at the Terrafirma4x4Store champion this brand and can offer expert advice as well as offering the entire range of products.
A brand new Terrafirma Catalogue was released this year and is now available in a PDF format.
This is free of charge and upon completion of order we will email it directly to you.
This catalogue is currently ONLY for Land Rover items.
Introducing the KAM Differentials electronic locking differential. ‘The Drop in Locker’
The KAM ‘Drop in Locker’ has the simplest operating system of any switchable diff lock,
•complicated wiring loom or air lines.
•2 wires and an illuminated dash mounted switch is all that is required.
•The uncomplicated switch arrangement also means the ‘Drop in Locker’ is the fastest switchable diff lock to install,
•no cutting or welding is required.
•A simple drilled and tapped hole for the electrical cable gland is the only machining operation that is required.
•A competent DIY mechanic should take no more than a few hours to completely install a KAM ‘Drop in Locker’ from start to finish.
•No special oils are required and service parts such as bolts and bearings are all the same as Land Rover original.
Land Rover 110 2002 onwards & The Wolf (Short Nose) Rear
Range Rover P38 - 1994-2002 fits both Front & Rear
Vehicles both 2 and 4 wheel drive, require differentials. The differential allows the outer wheel to rotate faster than the inner wheel during a turn, this is necessary as during the turn the outer wheel travels further and faster than the inner wheel. The speed of the outer wheel is proportionally faster than the inner wheel. Without a differential the transmission would bind up during road driving causing tyre scrubbing and unpredictable steering. The differential assembly also couples the input shaft (usually a prop shaft) to a pinion which in turn drives a crown wheel which is attached to the differential. The crown wheel and pinion also provides the final drive gear ratio for the vehicle. From the differential half shafts connect the drive to the wheels. On high traction surfaces such as tarmac, torque is transferred equally through the differential to the wheels, driving the vehicle forward. On low traction surfaces like snow or when a wheel lifts clear of the ground while off road the drive follows the path of least resistance allowing the wheel with the least or even no traction to spin freely as the torque is directed through the differential.
This basic system is known as an open differential and is typically fitted to vehicles as standard. An open differential is ideal for a road going vehicle but has limited capability off road. Four wheel drive transmissions provide twice as much traction, but even the most capable 4x4 vehicle can lose grip or lift a wheel in extreme conditions causing the vehicle to spin to a halt.
Fitting a KAM electronic locking differential known as the ‘Drop in Locker’ due to its ease of installation can make all the difference between success and failure when tackling off road obstacles or negotiating very low grip conditions.
Operating a dash mounted switch sends an electronic current via 2 high grade carbon brushes to 4 high power solenoids inside the differential which when energised, simultaneously pull a locking ring into engagement with the differential sun gear, immediately locking the differential gears and preventing the drive from following the path of least resistance. The unique patented design provides instant traction by transferring drive equally to each wheel. With ‘Drop in Lockers’ fitted front and rear your 4x4 can be driven in a much slower, more controlled manner reducing the likelihood of damage to the vehicle and the environment.
A manually operated locking differential means that you the driver has control, enjoy the precise and predictable handling of an ‘open’ diff on road and then 100% drive ‘locked’ when you need it most off road, simply engage and disengage the ‘Drop in Lockers’ as and when you need them.
The KAM ‘Drop in Locker’ has the simplest operating system of any switchable diff lock, no compressor, complicated wiring loom or air lines. 2 wires and an illuminated dash mounted switch is all that is required. The uncomplicated switch arrangement also means the ‘Drop in Locker’ is the fastest switchable diff lock to install, no cutting or welding is required. A simple drilled and tapped hole for the electrical cable gland is the only machining operation that is required. A competent DIY mechanic should take no more than a few hours to completely install a KAM ‘Drop in Locker’ from start to finish. No special oils are required and service parts such as bolts and bearings are all the same as Land Rover original.
Precision manufactured and heat treated using high grade materials
Super strong 2 piece housing
4 pinion centre
4 x electronic 12volt hi power solenoids
Industrial grade carbon brushes
Hardened steel slip ring
Neoprene slip ring isolators
9mm of locking gear engagement
4 high grade stainless steel disengagement springs
Illuminated switch and wiring loom.
Utilises Land Rover crown wheel bolts, carrier bearings and original spec oil (not supplied)
Full service and parts availability
No compressor or air lines
No cutting or welding required
Fast and straightforward installation
Accepts original Land Rover prop shaft and 24 spline half shafts.
2 year warranty (excluding competition use, max tyre diameter 35”)
We would like to wish all of our customers a Very Merry Christmas and Happy New Year.
We will be closing for Christmas on Thursday 21st December 2017 and will reopen on the 2nd of January 2018
Any orders or queries will be processed at the earliest opportunity in the first week of January.
UK Customers - if you wish to receive your order before Christmas, please ensure your order is place by the 19th of December.
Customers outside of the UK - For any orders before Christmas, we will endeavour to do our best to ensure your order is with you in time, but please be aware that the courier companies will have an increase in the number of packages to deliver at this time of year.